TY  - JOUR
A1  - Taube, Robert
A1  - Ganzert, Lars
A1  - Grossart, Hans-Peter
A1  - Gleixner, Gerd
A1  - Premke, Katrin
T1  - Organic matter quality structures benthic fatty acid patterns and the abundance of fungi and bacteria in temperate lakes
JF  - The science of the total environment : an international journal for scientific research into the environment and its relationship with man
N2  - Benthic microbial communities (BMCs) play important roles in the carbon cycle of lakes, and benthic littoral zones in particular have been previously highlighted as biogeochemical hotspots. Dissolved organic matter (DOM) presents the major carbon pool in lakes, and although the effect of DOM composition on the pelagic microbial community composition is widely accepted, little is known about its effect on BMCs, particularly aquatic fungi. Therefore, we investigated the composition of benthic littoral microbial communities in twenty highly diverse lakes in northeast Germany. DOM quality was analyzed via size exclusion chromatography (SEC), fluorescence parallel factor analyses (PRAFACs) and UV-Vis spectroscopy. We determined the BMC composition and biomass using phospholipid-derived fatty acids (PLFA) and extended the interpretation to the analysis of fungi by applying a Bayesian mixed model. We present evidence that the quality of DOM structures the BMCs, which are dominated by heterotrophic bacteria and show low fungal biomass. The fungal biomass increases when the DOM pool is processed by microorganisms of allochthonous origin, whereas the opposite is true for bacteria.
KW  - PLFA
KW  - PARAFAC
KW  - Size exclusion chromatography (SEC)
KW  - Aquatic fungi
KW  - Stable isotopes
KW  - FASTAR
Y1  - 2017
U6  - https://doi.org/10.1016/j.scitotenv.2017.07.256
SN  - 0048-9697
SN  - 1879-1026
VL  - 610
SP  - 469
EP  - 481
PB  - Elsevier
CY  - Amsterdam
ER  -